MHD900/5 Features: JL Audio MHD Series 5-Channel Class D Amplifier ¹Main Channels RMS Power Rating (11V-14.5V): 4 ohms: 100 watts x 4 chan. 3 ohms: 75 watts x 4 chan. 2 ohms: 75 watts x 4 chan. 1.5 ohms: 75 watts x 4 chan. ¹Bridged RMS Power Rating (11V-14.5V): Bridged, 8 ohms: 200 watts x 2 chan. Bridged, 6 ohms: 150 watts x 2 chan. Bridged, 4 ohms: 150 watts x 2 chan. Bridged, 3 ohms: 150 watts x 2 chan. ¹Subwoofer Channel RMS Power Rating (11V-14.5V): 4 ohms: 500 watts x 1 chan. 3 ohms: 500 watts x 1 chan. 2 ohms: 500 watts x 1 chan. 1.5 ohms: 500 watts x 1 chan. Class D, switching type with patented Single-Cycle Control technology Gray powder-coat finish Gasketed cover over control board Stainless steel hardware Pulse width modulation-regulated switching power supply LED power (green), protect (red) and low impedance (amber) indicators Removable Power/Ground and Speaker connectors Brushed aluminum finish chassis Compact, stackable chassis design RealSink Vertical, cast alloy fins effectively dissipate heat Advanced Thermal Rollback protection system R.I.P.S. - Regulated, Intelligent Power Supply Single Cycle Control - high-fidelity, full-range class D Compares the real PWM waveform and then corrects it in each and every cycle (over 400,000 times per second) 80% efficiency at 1/2 rated power for the whole amplifier, including its power supply 60% less current draw than a typical Class A/B car amplifier of equal power Less generated heat, smaller chassis than a similarly powerful Class A/B design. Noise-killing, highly flexible differential-balanced inputs Speaker level inputs via RCA (JL Audio XD-CLRAIC2-SW required and sold separately ²Remote bass level input (JL Audio HD-RLC required and sold separately) Optional stacking equipment for MHD amplifiers: JL Audio HD Stack Kit Selectable input voltage/sensitivity: Low level: 200mV - 2V High level: 800mV - 8V Selectable input modes: 2 Ch. / 4 Ch. / 6 Ch. Selectable State-variable slope: 12 dB/octave Butterworth or 24 dB/octave Linkwitz-Riley Cutoff Freq. Range: Continuously variable (All Ch): 50 - 500 Hz Selectable Infrasonic Filter (Sub Ch): Off / 30 Hz Total Harmonic Distortion: <0.03% @ 4Ω per main ch., <0.05% @ 4Ω sub ch. (Average at 1kHz) Signal to Noise Ration: (20 kHz bandwidth) Referred to Rated Power: 108 dBA Referred to 1 Watt: 88 dBA Frequency response: 12 - 28,000 Hz (+0, -1 dB) Damping Factor Ch. 1-4: >400 @ 4Ω/50 Hz, >200 @ 2Ω/50 Hz Damping Factor Sub Ch.: >800 @ 4Ω/50 Hz, >400 @ 2Ω/50 Hz Recommended fuse rating: 60A x 1 (inline, not included) Dimensions: 10.74"L x 7.85"W x 1.93"H ³4 gauge OFC power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier. Click Here for our contact information.